The features from the optional InnoDB Plugin
from MySQL 5.1 are folded into the built-in
InnoDB storage engine, so you can take
advantage of features such as the Barracuda file format,
InnoDB table compression, and the new
configuration options for performance. See
Chapter 14, The InnoDB Storage Engine for details.
InnoDB also becomes the default storage
engine for new tables. See Section 14.1, “Introduction to InnoDB”
for details.